fort Cockham

Cockham Wood Fort was constructed in 1669 on the north bank of the river Medway
 it took on the role of defending Chatham Dockyard from seaborne attack, a role which had been performed by Upnor castle for the previous hundred years.
The fort was abandoned around 1818 after several decades of gradual dilapidation. Some of its structure is still standing, the most obvious part being the brickwork of the lower battery which is a prominent feature on the shoreline of the River Medway.